Dust exhausting device for surfacing wheels



- ATTY H G. EISLER DUST EXHAUSTING DEVICE FOR SURFACING WHEELS Flled Aug13 1943 I HENRY a. EISLER Patented Aug. 28, 1945 DUST EXHAUSTING DEV ICE:SURFACING WHEELS,

Henry G. o Eisl er, Wilmette, 111., assignor .to The Bell '& HowellCompany, Chicago, 111., a corporation of Illinois Application August 1inventionrelates to adust exhausting device forsurfacing wheels, such"as grinding and polishing wheels, and'involves axusual dust exhaustinghood *spacedly shrouding a rotatory surfacing wheel-andprovided with awork opening at which work is presented to'th'eflwheel and'with anexhaust :outlet :spaced from the work opening and connectedwitmanexhaustingvfan for drawing: air

3, 1943, Serial 'No. 498,597

4 Claims. (cr sp-21s) and with it .dust resulting from surfacingopenations from the work opening into the ho-odand out "of the hood "throughthe outlet for suitabledisposal, so that the dust is not dispersed intothe surroundingatmosphere.

' Thelgeneralaobjectof the invention resides in theprovisioniin'adustexhaustingdevice of the above character, of a novel and efiective Imeans whereby the passageof air through the exhausting hood :fromthework opening-to the outlet thereof is adjustably controlled so that,while adequate and efllcient dust removal is assured for allconditions,the amount of air drawn through thework opening .ofthe hood fromthesurrounding atmosphere'may'be maintained at a minimum consistent withthe instant working conditions and ,sothat the passage='of'air'throughthe hood maybe stopped when the'surfacing-wheel is not being used.

Accordingly, the amount of :air whichis withdrawn froma room in whichoneor moresurfacing wheelsequipped'with myinventionis-or are installedmay be minimized, with the resulttthat suchwithdrawalxof air may have aminimum undesirable efiect uporrthe control of the atmosphere of theroom,which is of considerable importance where a considerable number ofgrinding wheels are installed in a room in which the atmosphere is airconditioned. i r The invention willzbe better understoodby reference tothe accompanying drawing'in which- Figure 1 is a partial front elevationof a surfacing wheel equipped with my invention;

Figurerzis a side-elevation of the same; and Figure :3:is a sectionalview in elevation-similar tothat of Figure 2'. r Referring-tothe-drawing, I designates a drivtog-motor, upon the rotating shaft 2 ofwhich is seemed, as designated at 3, a surfacing whee-l 4-icr rotationtherewith, the wheel shown being apolishing wheel.

:A-dustexhausting hood'i'vof generally conventional characteristics issecured in position a conduit communicating withthe interior of the hoodand spaced from-thework opening peripherally of the wheeland extendingtangentially of the wheel in the direction'of rotation thereof, whichdirection is indicated by the arrow 8 inFigure 3.

The hood 511s also'provided with an air inlet 9 in the form of a,conduit communicating with the interior ofthehood and spaced fromthework opening peripherally of the wheel and extending tangentially ofthe wheel in the direction opposite the direction of rotationthereof andsubstantially alined with the outlet 1. r

A damper-plate is disposed within the hood 5 and extends across betweenthe side walls thereof and extends peripherally of the whee1 4 betweenthe work opening "-6 and the outlet 1, and is disposed incontinuingrelation with the outlet, and is curved correspondinglywith-the periphery of the wheel, so that the concave surface thereoffaces the periphery of the wheel.

The damper plate H is pivotally mounted on the side walls l2 of the hood.i, as designated at l3,with it's work opening corresponding end Itspaced outwardly from the periphery of thewheel and :disposedsubstantially at the peripheral wall l5 of the hood andonan axisparallelto the axis of thewheel and spaced outwardly from theperipher-y thereofand disposed substantially at said worhopening corresponding end. As sopivotally mounted, the outletzcorresponding end l6 of the damper plate His adjustable toward and away from the periphery of the wheel 4 toadjustably control the passage of air through the hood fromthe workopening 6 to theoutlet 1 between the damper plate andthe periphery ofthe wheel, as best shown in Figure 3, and may be adjusted. into closeproximity to the wheel, as shown by dot and dash lines in-this figure,to substantially stop the passage of air between the damper plate andthe periphery of the wheel when the wheel is not being used,

The :damper plate H extends beyondthe inlet 9 in the direction towardthe outlet 1, so that, as it isv adjusted toward and away from theperiphery, of'the wheel, it is also adjusted outof and into obstructingrelation with the inlet ",9.

. As a result, adjustment of the damper ,platell spacedly shroudingthe-:polishingwheel 4, and is does not have any tendency to vary thepartial vacuum at the outlet 1 for the reason'that as the openingbetween the damper plate and the wheel is decreased, the opening of theair inlet 9 is increased and vice'versa.

The damper plate H is positioned'in the various adjustments thereof :bymeans of a suitable releasable clamping device, generally=designatedperiphery of the wheel.

The damper plate 2! is pivotally mounted on the side walls I2 of thehood 5 by means of a pivot shaft 22 journaled carried on an arm 26secured on the pivot shaft 22 and operable through a segmental slotthrough one side wall of the hood 5.

The damper plate as indicated by the arrows 28 in Figure 3.

The damper plate 2| is preferably adjusted closely adjacent the wheel 4to substantially prevent air passing through the hood to the outlet 1 inthe direction opposite the direction of rotathis damper is particularlytrue of the dampei plate II, a relatively large ail opening beingprovided by this damper plate at the work opening 6.

While I have thus described my invention, I do not wish to be limited tothe precise details but having thus described my invention, I claim asnew and desire to secure by Letters Patent the following:

1. In a device of combination with a rotatory surfacing wheel andrelation with said inlet.

2. In a device of the character described, the

damper members toward and away from the periphery of said wheel.

4. In a device of the character described, the combination with arotatory surfacing wheel and a dust exhausting hood spacedly shroudingthe same and provided with a work opening and an exhausting outletspaced from said work opening peripherally of'said wheel and extendingtangentially of said wheel in the direction of rotation thereof andprovided with an air inlet spaced from said work opening peripherally ofsaid wheel and extending tangentially of said wheel in the directionopposite the direction of rotation thereof and substantially alined withsaid outlet, of two damper plates Within said hood and extendingperipherally of said Wheel between said work opening and said outletrespectively in opposite directions With respect to said outlet and oneof which is disposed in continuing relation with said outlet and extendsbeyond said inlet in the direction toward said outlet and said damperplates being curved correspondingly with the periphery of said wheel andindependently pivotally mounted with their Work opening correspondingends spaced outwardly from the periphery of said wheel and substantiallyat the peripheral wall of said hood and on axes generally parallel tothe axis of said wheel and spaced outwardly from the periphery thereofand disposedin the regions of said work opening corresponding ends foradjustment of the outletcorresponding ends of said damper plates towardand away from the periphery of said wheel and the outlet correspondingend of said one damper plate out of and into obstructing relation withsaid inlet.

HENRY G. EISLER.

